audioOS 9.9.15.2 (build 19K6052) is an official Apple over-the-air update for the HomePod, released on 2021-12-13T18:28:16Z. The update package is 1.93 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e21fabbe21238ec0bfe9bfb8a536eada01a67a3a.zip.